| Electronics > Repair |
| Rohde & Schwarz Signal Gerator SML-01, (FIXED) |
| << < (3/10) > >> |
| dave_k:
--- Quote from: IconicPCB on January 28, 2016, 06:23:20 am ---Why do they make it so flaming hard to love them. --- End quote --- In many ways R&S is like Apple - everything is confined to their closed universe (ie: no user servicing allowed!) |
| wilhe_jo:
Any progress??? I spotted the -15V Rail of the LCD to be only -10 if connected.... -13.5 without LCD... datasheet for the LCD : https://static.davandisplay.com/document/spec_sheet/LMG7380QHFC-SPECS.pdf My unit has traffic on the LCD so, everything else should be Ok.... ---update -10V might be fine... R/W lines are toggling.. so the unit is running. The Chip-Enable is a bit suspicious since it never gets low... 73 |
| IconicPCB:
Had a chat with the service department. Equipment is now obsolete.. NO SERVICE MANUAL... in any case repair is by replacement of suspect modules and the entire instrument has only a few modules. That gives You a clue as to how to repair it. Sell it on ebay. >:D As for my issues with the battery.. Service centre has a flat "survey" fee of a few hundred dollars. I may choose to have the battery replaced by the service centre ordo it myself. On the question of what exactly does the back up battery back up.. a few clues .. but the major clue is .. equipment has a self cal capability. |
| wilhe_jo:
you can get the service manual via google... but not the schematics :( 73 |
| HighVoltage:
--- Quote from: Theboel on January 20, 2016, 11:37:18 pm ---I think You need to check this area --- End quote --- That was right on! Plus the caps is the PSU. After fixing the electrolytic caps, in the PSU, the 3.3V rail was dead because of a bad regulator. It turned ON right away and seems to be working perfectly. I still have to check all settings and see if the modulation even works but I am getting a perfect 100 MHZ signal out of. Measured by the just repaired and calibrated Agilent 53132A counter. Looks like another great addition to the lab. Thanks for all your suggestions and links to documentation. |
| Navigation |
| Message Index |
| Next page |
| Previous page |